Results 81 to 90 of about 263,888 (208)
Optimization research on carrier phase-shifting modulation method of cascade multi-level inverter
Gong-kuang zidonghua, 2014 The traditional carrier phase-shifting modulation method of cascade high-voltage inverter has the problems of large switching loss and low utilization rate of DC voltage, and modulation method based on combination of carrier phase-shifting and vector ...
ZHENG Zheng, YAN Fei, ZOU Jin
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电力工程技术The flexible multi-state switch (FMSS), as a new generation of flexible interconnection device, enables flexible interconnection between different feeders in distribution networks by replacing traditional tie switches.
Xiaolan YANG +5 more
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Journal of Physics: Conference Series, 2019 Abstract The paper offers a new vector-coordinate description for a complex-plane position of a neutral bias voltage phasor relevant to a three-phase circuit with an unbalanced load. It is assumed that no negative sequence voltage component is present, i.e. the supply three-phase system voltages are symmetric and sinusoidal.
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Narrow bandwidth video Patent [PDF]
, 1969 Improvements in receiver of narrow bandwidth television ...
Bockwoldt, W. H.
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Evaluation Of The Zero Sequence Impedance Of Overhead High Voltage Lines
, 2013 As known, the guard wires of overhead high voltage are usually grounded through the grounding systems of support and of the terminal stations. They do affect the zero sequence impedance value of the line, Z0, which is generally, calculated assuming that the wires guard are at ground potential.
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Reduction of total harmonic distortion in power inverters [PDF]
, 2005 The output voltage of PWM power inverters shows harmonic distortion due to several causes; the main ones are the modulation algorithm, nonlinearities in the output filter, dead times, voltage drops across the switches and modulation of the dc bus voltage.
Aymonino, Oscar Andres +3 more
core
Method of damping nutation motion with minimum spin axis attitude disturbance [PDF]
, 1983 In a method of and apparatus for damping nutation of a spinning spacecraft, spin axis attitude disturbances are substantially reduced by controlling at least one nutation damping gas thruster to fire with nonuniform gas pulses.
Hoffman, H. C.
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Non-universal transmission phase behaviour of a large quantum dot
, 2017 The electron wave function experiences a phase modification at coherent transmission through a quantum dot. This transmission phase undergoes a characteristic shift of $\pi$ when scanning through a Coulomb-blockade resonance.
Bäuerle, C. +8 more
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Overview of increasing the penetration of renewable energy sources in the distribution grid by developing control strategies and using ancillary services [PDF]
, 2014 Increasing the renewables energy resources in the distribution network is one of the main challenges of the distributed system operator due to instability, power quality and feeder capacity problems. This paper proposes a solution for further penetration
Bozalakov, Dimitar +3 more
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Fast Sequence Component Analysis for Attack Detection in Synchrophasor Networks [PDF]
, 2015 Modern power systems have begun integrating synchrophasor technologies into part of daily operations. Given the amount of solutions offered and the maturity rate of application development it is not a matter of "if" but a matter of "when" in regards to ...
Barella, Richard +6 more
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